PUBLISHED BY SOYBEAN GROWERS FOR THE FEED INDUSTRY
MAY 2013
Estimates for the 2013 soybean crop are somewhat an unknown at this time; the U.S. Department of Agriculture was estimating the soybean growers were going to plant about the same acreage of soybeans this summer as last year and soybean yields were likely to be negatively impacted by dry soil conditions affected by last year’s drought. However, the abnormal weather in Midwest states during April and May will likely change these forecasts. Spring rains (and snows) have improved soil moisture levels in many areas, however, cold and wet soil conditions have delayed corn and soybean plantings. These delays could impact soybean yields and the summer’s weather is a big unknown. Maybe, soybean production information will be clear in the next Soybean meal INFOsource newsletter.

U.S.D.A. has revised their soybean meal domestic production and export estimates. They indicate that both meal production and exports will be slightly reduced for the 2012/2013 crop year compared to the previous crop year due primarily to higher meal costs ($415-535/ton projection versus $394/ton estimated for the 2011/2012 crop year).

Chart 1
*estimate; **projection for the marketing year beginning October 1 for soybean meal.
Reference-World Agricultural Supply and Demand Estimates (WASDE-518, May 10, 2013).

Amino Acid Digestibilities-Swine
A study was conducted to determine the standardized ileal digestibility (SID) of amino acids (AA) and to calculate net energy (NE) for micronized regular full-fat soybean (R-FFSB) and low stachyose and raffinose full-fat soybean (LSR-FFSB) for growing pigs. Six ileal-cannulated barrows weighing 31.4 kg were fed six diets in a 6 × 6 Latin square. The six diets were cornstarch-based with soybean meal (SBM), R-FFSB, LSRFFSB, or lentil as the sole source of protein; N-free diet (NFD); and enzymatically hydrolyzed casein diet (EHC). Energy digestibility in SBM, R-FFSB and LSR-FFSB was determined difference from the NFD and the SID of AA for SBM and test ingredients was calculated using NFD or EHC.

Results indicated that the SID of AA for feedstuffs was similar between two methods (NFD vs. EHC). The SID of lysine for SBM (93%) was higher (P < 0.05) than that for R-FFSB or LSR-FFSB, which were similar in SID of lysine (76 vs. 79%). The SID of other indispensable AA for SBM was also higher (P < 0.05) than that for R-FFSB or LSR-FFSB, which were similar in SID of the same AA.

The NE value for SBM was estimated to be 2.62 Mcal/kg of DM. However, SBM had lower (P < 0.05) NE content than R-FFSB or LSR-FFSB, which were similar in NE content (2.96 vs. 3.07 Mcal/kg of DM). The researchers concluded that FFSB (regular vs. LSR) may not affect the NE and SID of AA for micronized FFSB fed to pigs. Micronized FFSB (regardless of seed characteristic) is a better source of dietary energy, but not AA compared to SBM.

Woyengo, T.A, and coworkers. 2013. Nutritional value of lentil and micronized full-fat soybean fed to growing pigs. Abstract O080. 44Th Midwest Meeting of Am. Dairy Sci. Assn. and Am. Soc. Animal Sci. held in Des Moines, IA. on March 11-13.


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